Cheap Flight Tickets from Seattle (SEA) to St Louis (STL), Starting at $546

Good to Know: Cheapest and Fastest SEA - STL Flights

Useful information for finding best airline tickets from Seattle Tacoma International to Lambert St Louis International on your next trip.

Cheapest Round Trip Flight

$546

DL Delta Airlines • 1 stop • 13h 44m

Aug 19 – Sep 12

The cheapest round trip flight from Seattle to St Louis (SEA-STL-SEA) is currently $546

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Cheapest Direct Flight

$20236

WN Southwest Airlines • nonstop • 6h 40m

Aug 17

The cheapest nonstop flight from Seattle to St Louis (SEA-STL) is currently $20236

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Fastest Flight

5h 50m

The fastest nonstop flight from Seattle to St Louis (SEA-STL) takes 5h 50m

Top Airlines Flying from Seattle to St Louis

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

Latest Flight Deals from Seattle (SEA) to St Louis (STL)

Compare and book low fare round-trip air tickets from Seattle to St Louis. Ideal for travelers with confirmed return itineraries.

Aug 19 - Sep 12, Economy
DL
Seattle → St Louis
13h 44m
11:59 PM - 10:23 AM • 1 stop
DL
Seattle → St Louis
10h 3m
12:10 PM - 4:13 PM • 1 stop
$546
Delta Airlines
Aug 19 - Sep 14, Economy
WN
Seattle → St Louis
23h 40m
5:20 AM - 9:40 PM • 1 stop
WN
Seattle → St Louis
10h 45m
6:25 AM - 11:10 AM • 1 stop
$20522
Southwest Airlines
Aug 21 - Sep 15, Economy
WN
Seattle → St Louis
15h 50m
6:15 AM - 6:05 PM • 1 stop
WN
Seattle → St Louis
15h 50m
3:45 PM - 11:35 PM • 1 stop
$20522
Southwest Airlines
Aug 21 - Sep 15, Economy
WN
Seattle → St Louis
19h 10m
5:15 AM - 7:05 PM • 1 stop
WN
Seattle → St Louis
15h 50m
3:45 PM - 11:35 PM • 1 stop
$20522
Southwest Airlines
Aug 19 - Sep 14, Economy
WN
Seattle → St Louis
12h 5m
8:30 AM - 5:55 PM • 1 stop
WN
Seattle → St Louis
7h
8:25 AM - 10:45 AM • nonstop
$20736
Southwest Airlines
Aug 19 - Sep 14, Economy
WN
Seattle → St Louis
8h 55m
11:10 AM - 6:45 PM • 1 stop
WN
Seattle → St Louis
10h 50m
12:45 PM - 5:35 PM • 1 stop
$21236
Southwest Airlines

Fly from Seattle to St Louis with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to St Louis? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Seattle to St Louis Flights

What are the airports in Seattle?
SEA
What’s the most popular airline flying from SEA to STL?
The most popular airline flying from Seattle to St Louis are
Can I fly from SEA to STL non-stop?
Yes, you can fly SEA to STL non-stop on
Which airlines fly nonstop between Seattle and St Louis?
The non-stop flights between Seattle and St Louis are .
What’s the earliest departure time from SEA to STL Airport?
The earliest flight leaves SEA at 5:15 am and lands in STL - Lambert St Louis International
What are the airports in St Louis?
STL
Can I make changes to my Seattle to St Louis flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from SEA to STL?
Read the fare rules of the Seattle to St Louis air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Seattle and St Louis?
operate flights between Seattle and St Louis
How long does a flight from Seattle to St Louis take?
It takes approximately 4 hour to fly non-stop from SEA to STL, which is 1709.07 miles by air.
Which airlines provide the cheapest flights from Seattle (SEA) to St Louis (STL) ?
In the past couple of days, the cheapest tickets to STL from SEA were found on WN : USD 20522
Do I need a passport to fly between SEA and STL?
No
What’s the latest departure time from SEA to STL ?
The last flight leaves SEA at 11:59 pm

Seattle (SEA) to St Louis (STL): Airport Information

Origin Airport Seattle Tacoma International , Seattle, US
Destination Airport Lambert St Louis International , St Louis, US
Distance 1709 miles

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